JP3943246B2

JP3943246B2 - Reinforcement girder mounting device

Info

Publication number: JP3943246B2
Application number: JP15894498A
Authority: JP
Inventors: 弘晃林; 正之早田; 隆典青木葉; 正行田中; 泰久梶谷
Original assignee: West Japan Railway Co
Current assignee: West Japan Railway Co
Priority date: 1998-06-08
Filing date: 1998-06-08
Publication date: 2007-07-11
Anticipated expiration: 2018-06-08
Also published as: JPH11350402A

Description

【０００１】
【発明の属する技術分野】
本発明は補強桁取付装置に係わり、特に、枕木に固定したレールに沿って複数の補強桁を配置し、枕木と交差する補強桁部分を長手方向に挟んで一対のＵ字型ボルトを枕木を抱き込むように設け、該Ｕ字型ボルトを介して補強桁を枕木に固定する補強桁取付装置に関する。
【０００２】
【従来の技術】
鉄道用の軌道は、一般に砕石や砂利等からなる道床を路盤上に敷設し、道床上に枕木とレールを組立てた軌框を敷設して構成する。レールの圧力を枕木で支持し、道床に伝達し、枕木を所定の位置を保持するとともに、前記圧力を路盤に広くかつ均等に伝えるようにしている。このような軌道において、路盤直下で地下道等の地下構造物を構築する場合、路盤が沈下してその支持力が低下または喪失し、鉄道の脱線や転覆事故を招く恐れがある。このため、予め軌框を補強して安全を確保する対策が取られている。軌框の補強方法としてレールに沿って枕木上に複数の補強桁を設置し、これを枕木に係止して、路盤に沈下した際、当該軌框部を補強桁で吊り上げる方法が取られている。その際、補強桁を枕木に係止するために、Ｈ型鋼などの補強桁の下フランジにあらかじめ工場で穴を通孔しておき、該穴に枕木を抱き込むように下方よりＵ字形ボルトを挿入し、これをナットで締め込み締結する方法をとっている。
【０００３】
しかし、この方法では、枕木を抱き込んだＵボルトを補強桁に通孔した穴に挿入しようとすると、設置されている枕木が所定の等間隔のピッチで無いため、Ｕボルトを補強桁の穴に挿通できない場合が生じる。かかる場合、枕木を設置し直すことにより、あるいは、補強桁の下側フランジに現場で穴を通孔することにより対処している。前者は施工能率が大変悪くなり、後者は作業が煩雑となると共に品質のバラツキを生じて都合が悪く、ともに採用することは不可能である。
この結果を踏まえて、軌框の沈下防止を容易にかつ確実に行える補強桁取付装置が特開平9-177003号として提案されている。図１０〜図１２はかかる提案されている従来技術としての補強桁取付装置の説明図であり、図１０は平面図、図１１は図１０のＡ−Ａ線に沿う拡大断面図、図１２（ａ）は図１０のＢ−Ｂ線に沿う拡大断面図、図１２（ｂ）は補強桁と支持ブロックと架橋片との取り付け状況説明図である。
【０００４】
この補強桁取付装置では、道床１の内部に等間隔で埋設された枕木２に固定したレール３（図１０）に沿って複数のＨ型鋼からなる補強桁４を配置し、一対のＵ字型ボルト１０を枕木２と交差する補強桁４の長手方向両側に、枕木２を抱き込むように設け、該Ｕ字型ボルト１０を支持ブロック５、架橋片７を介してナットで締結することにより補強桁４を枕木２に固定する。すなわち、略Ｌ字型状で箱型の４つの支持ブロック５（図１２）を設け、その段差部６に設けたボルト穴６ａをＵ字型ボルト１０の軸部１０ａに差し込み、しかる後、支持ブロック５を補助桁４の両側内面に２個づつ係合する。かかる状態で架橋片７に形成した穴９をＵ字型ボルト１０の軸部１０ａに差し込みながら該架橋片７を補強桁４の上方から載置し、各一対の支持ブロック５を架橋片７とＵ字型ボルト１０を介してナット１２で固定する。
【０００５】
以上のように、従来技術の補強桁取付装置によれば、枕木２と補強桁４間を支持ブロック５、Ｕ字形ボルト１０、架橋片７を用いて固定することにより、補強桁に設けたボルト穴に応じて枕木を移動する煩雑な作業を廃して、この種の作業能率の向上が可能となる。また、補強桁を安定かつ堅固に支持できると共に補強桁の係合部の剛性を向上でき、更には、Ｕ字形連結ボルトの採用により枕木と補強桁間の取付けを容易にでき、しかも、４個の支持ブロックを配設することにより軌框重量の分散を促し、補強桁の強度負担を軽減できる。
【０００６】
【発明が解決しようとする課題】
しかし、従来技術の補強桁取付装置では、鉛直方向沈下に対して軌框を堅固に支持することができるが、水平方向の変形に対して、補強桁とＵ字形ボルトによる係止方法では抑止効果があまり期待できない問題がある。
また、従来技術の補強桁取付装置では、Ｕ字形ボルトの軸が断面円形のため、枕木とＵ字形ボルト間の接触面積、すなわち枕木下部を係止する部分の面積が狭く、枕木に部分的な疲労を与えて局部的損傷を与える問題がある。
また、従来技術の補強桁取付装置では、Ｕ字形ボルトを締め付けているナットが列車振動等の影響で緩む恐れがあり、その結果、他の部分に作用する軌框重量による荷重が増加する問題がある。
また、従来技術の補強桁取付装置では補強桁の取り付け、取外しが面倒であり、軌道保守作業の効率化において問題がある。
【０００７】
以上から本発明の目的は軌框の沈下防止に加えて水平方向の移動防止効果を高めることができ、しかも、補強桁の取付、取外しを容易に行える補強桁取付装置を提供することである。
本発明の別の目的は、枕木の局部的な損傷を防止できる補強桁取付装置を提供することである。
本発明の別の目的は、ボルトの緩みを防止して軌框重量を均等に分散できる補強桁取付装置を提供することである。。
【０００８】
【課題を解決するための手段】
枕木に固定したレールに沿って複数の補強桁を配置し、一対のＵ字型ボルトを枕木と交差する補強桁部分の長手方向両側に、下方より枕木を抱き込むように設け、該Ｕ字型ボルトを介して補強桁を枕木に固定する補強桁取付装置であり、補強桁が載置される第１部材と補強桁を押さえ込んで固定する第２部材を設ける。第１部材の上面平坦部に一対のＵ字型ボルトの４つの軸部が挿通される４つの穴を形成し、下面に枕木上面部が嵌まるように係止部を形成する。また、第２部材に補強桁の下側フランジ部を押さえ込む舌片と前記Ｕ字型ボルトの軸部が挿通される穴を形成する。第１部材を一対のＵ字型ボルトの４つの軸部に挿入すると共にその下面係止部が枕木に嵌まるように取り付け、また、第２部材をＵ字型ボルトの軸部に挿入して舌片で補強桁の下側フランジを押さえ込むように取り付け、しかる後、Ｕ字型ボルトにナットを嵌め込んで締め付けることにより補強桁を枕木に固定する。このように第１部材の下面に枕木の水平移動を抑止する係止部を設け、この第１部材を第２部材とＵ字型ボルトを介して補強桁に強固に固定したから、沈下防止に加えて枕木の水平移動を効果的に防止することができる。
【０００９】
また、ナットを緩め、第２部材を補強桁の長手方向に向けることで、すなわち、舌片による押さえ込みを解除することにより補強桁の取り外しが簡単にでき、このため軌道保守作業を確実に、しかも効率的に実施することができる。
また、Ｕ字型ボルトの枕木下部との接触部分を平坦にすることにより、枕木の局部的な損傷を防止できる。
また、Ｕ字型ボルトの軸部に嵌め込むナットを、凸形状部を有する第１のナットと、該凸形状部に係合する凹形状部を備えた第２のナットを有する緩み止めナットで構成することにより、列車通過振動によるボルトの緩みを防止して軌框重量を安定して均等に分散することができる。
【００１０】
【発明の実施の形態】
図１は本発明の補強桁取付装置の平面図、図２は本発明の補強桁取付装置の正面図、図３は本発明の補強桁取付装置の側面図、図４（ａ）は本発明で使用する金具（溝型鋼、取付金具）の斜視図、（ｂ）は溝型鋼の底面図、図５は本発明で使用するＵ字型ボルトの構成図である。
図において、１１（図２）は路盤上に施設した砕石、砂利等からなる道床であり、この内部に枕木が等間隔で埋設される。１２は断面が等脚台形状の枕木で中間部上面に略船型断面の凹部１２ａ（図３）が形成され、該凹部１２ａの外側上面に一対のレール１３が離間して施設されている。枕木１２の両端部上面と中央部凹部１２ａ上には、Ｈ型鋼からなる補強桁１４がレール１３に沿って配置されている。補強桁１４は断面がＨ字状になっており、ウェブ１４ａと該ウェブ１４ａの上下端部に突設した上側フランジ１４ｂ、下側フランジ１４ｃを有している。
【００１１】
補強桁１４の下の枕木部１２上には、溝型鋼１５₁〜１５₃がそれぞれ設けられ、この溝型鋼の上に補強桁１４が載置されるようになっている。溝型鋼１５₁〜１５₃は図４に示すように、上面に平坦部ＰＬと壁部ＷＬ１，ＷＬ２を備えている。また、両側の溝型鋼１５₁，１５₃の下面には枕木上端部が嵌まるように３つの係止部１５ａ〜１５ｃが形成され、中央の溝型鋼１５₂の下面には枕木の中央上側が嵌まるように係止部１５ｂ〜１５ｃがそれぞれ形成されている。なお、具体的には、係止部１５ａ〜１５ｃはＬ字型の山型鋼を溶接により溝型鋼１５₁〜１５₃の下面に取り付けることにより形成される。溝型鋼１５₁〜１５₃の平坦部ＰＬの４隅には、枕木を補強桁に固定するための一対のＵ字型ボルト１０の４本の軸部１０ａが挿通される貫通穴１５ｄ₁〜１５ｄ₄が形成されている。
図では、係止部１５ｂ，１５ｃを貫通して貫通穴１５ｄ₁〜１５ｄ₄が形成されているが、係止部１５ｂ，１５ｃの幅を狭めることによりこれら係止部に穴が形成されないように構成することもできる。
【００１２】
Ｕ字型ボルト１０は枕木１２と補強桁１４の交差部分に枕木を下方より抱え込むように、かつ、補強桁の両側に並設されている。Ｕ字型ボルト１０の軸部１０ａ，１０ａの先端にはナットが嵌合するようにネジ部１０ｂ、１０ｂが形成され（図５（ａ））、また、枕木下部との接触部分１０ｃは図５（ｂ）に示すように平坦に形成され、枕木の局部的な損傷が発生しないように工夫されている。
枕木１２を抱き込むようにして道床１１から突出する一対のＵ字型ボルト１０の４つの軸部１０ａには溝型鋼１５の貫通穴１５ｄ₁〜１５ｄ₄が挿入されると共に、補強桁１４の４つの取付金具１６（図４）が挿通される。取付金具１６は補強桁１４の下側フランジ１４ｃを押せ込む舌片１６ａ、Ｕ字型ボルトの軸部１０ａが挿通される穴１６ｂを有している。
【００１３】
補強桁取付装置の組立に際して、枕木１２をその両側及び中央の３か所でそれぞれ一対のＵ字型ボルト１０で抱え込み、軸部１０ａが道床１１から突出するように埋設する。かかる状態で、上記３か所において、道床１１から突出するＵ字型ボルト１０の４つの軸部１０ａに溝型鋼１５の４つの貫通穴１５ｄ₁〜１５ｄ₄を挿入すると共に下面に形成した係止部１５ａ〜１５ｃが枕木１２の上面に嵌まり込むように溝型鋼１５₁〜１５₃を枕木に取り付ける。
かかる状態で３本の補強桁１４をレール１３に並行に各枕木の対応する溝型鋼１５₁〜１５₃の平坦部中央に載置し、しかる後、枕木と補強桁の交差部毎に、４つの取付金具１６を各舌片１６ａが補強桁１４の下側フランジ１４ｃを押せ込むようにＵ字型ボルトの軸部１０ａに挿入する。これにより、溝型鋼の平坦部と舌片１６ａで補強桁の下側フランジ１４ｃを挟み込んだ状態で、ナット１７をＵ字型ボルトの軸部１０ａに形成したネジ部に嵌合して締め付ける。これにより、補強桁１４の下側フランジ１４ｃは取付金具１６に強固に押さえ込まれて枕木１２に固定する。
【００１４】
この場合、ナットを緩み止めナットとすることができる。図６は緩み止めナットの一例の説明図であり、２１はボルト、２２は緩み止めナットであり、凸形状部を有する下ナット２２ａと、該凸形状部に係合する凹形状部を備えた上ナット２２ｂを備えている。凸形状部の外形寸法を凹形状部の外形寸法より若干大きめにすることにより、以下の効果が発揮される。すなわち、下ナット２２ａを取付後に、上ナット２２ｂを締め付けると自動的にＰ₁矢印方向に応力が加わり、締め込み量に比例して水平応力が増加する。この水平応力の増加は下ナットと上ナットが密着するまで続き、クサビ作用による完全なロック効果が得られる。すなわち、締結後の内部応力の分布はＰ₁＋Ｐ₂＋Ｐ₃の合成応力として内在され、外部からの衝撃、振動に極めて強く、緩むことがない。従って、ナットとして緩み止めナットを使用することにより列車通過等に起因する振動が発生してもボルト緩みを効果的に防止することができる。
【００１５】
なお、Ｕ字型ボルト１０、は図７に示すように、軸部１０ａ、１０ａの付け根部分において、くぼみ１０ｄ、１０ｄを形成するように加工しても構わない。
また、Ｕ字型ボルト１０のさらに別の変形例として、図８に示すように、断面が円形をなす鋼材を折り曲げ加工してから軸部１０ａ、１０ａを連絡している部分に平板状の素材１０ｐを一体化させる形で加工して、枕木下部との接触部分１０ｃが平坦になるようにしても構わない。平板状の素材１０ｐを用いる場合には、図７に示す場合と同様に、軸部１０ａ，１０ａの付け根部分にくぼみ１０ｄ、１０ｄが必然的に形成される。これら、図７，図８に示すＵ字型ボルト１０のように、くぼみ１０ｄ、１０ｄを形成しておくと、図９に示すように、枕木１２の断面形状が底部において９０°をなしていたときに（実際にそういう枕木が多い）、Ｕ字型ボルト１０が枕木１２を両側部から堅固に抱き込んだ状態で補強桁１４を固定することが可能となる。従って、単純な曲げ加工を行ったＵ字型ボルトでは軸部１０ａ、１０ａの付け根の部分にＲが残って枕木１２を列車走行方向（図９左右方向）に拘束することが困難であるが、図７、図８に示すくぼみ１０ｄ、１０ｄを形成したＵ字型ボルト１０ならば、補強桁１４がこの方向に移動するのを阻止する効果も極めて高くなる。
【００１６】
以上のように、本発明によれば、補強桁１４の下に溝型鋼１５を設置し、取付金具１６とＵ字型ボルト１０を介して補強桁１４を枕木１２に固定するから、枕木１２と交差する補強桁１４の周囲を堅固かつ安定して支持でき、しかも、軌框重量の分散を促し、補強桁１４の強度負担を軽減できる。また、ナット１７を緩め、取付金具１６を９０⁰回転して補強桁１４の長手方向に向けることで、すなわち、押さえ込みを解除することで補強桁１４の取り外し、取付ができ、取り外し、取付作業を簡単にできる。
また、溝型鋼１５の下面に枕木１２の水平移動を抑止する係止部１５ａ〜１５ｃを設け、この溝型鋼１５を補強桁１４に取付金具１６とＵ字型ボルト１０を介して強固に固定したから、枕木等の沈下防止に加えてその水平移動を効果的に防止できる。
以上、本発明を実施例により説明したが、本発明は請求の範囲に記載した本発明の主旨に従い種々の変形が可能であり、本発明はこれらを排除するものではない。
【００１７】
【発明の効果】
以上本発明によれば、軌框の沈下を容易かつ確実に防止でき、従来のように補強桁に設けたボルト穴に応じて枕木を移動する煩雑な作業を廃して、この種の作業能率を向上することができる。
また、本発明によれば、第１部材（溝型鋼）の下面に枕木の水平移動を抑止する係止部を設け、この第１部材を補強桁に第２部材（取付金具）とＵ字型ボルトを介して強固に固定したから、枕木等の沈下防止に加えてその水平移動を効果的に防止することができる。
【００１８】
また、本発明によれば、Ｕ字型ボルトの枕木下部との接触部分を平坦にしたから、枕木の局部的な損傷を防止できる。
また、本発明によれば、Ｕ字型ボルトの軸部に嵌め込むナットを、凸形状部を有する第１のナットと、該凸形状部に係合する凹形状部を備えた第２のナットを有する緩み止めナットで構成したから、列車通過振動によるボルトの緩みを防止でき、緩みに起因するＵ字型ボルトに作用する荷重のバラツキをなくすことができる。
また、本発明によれば、補強桁の下に第１部材（溝型鋼）を設置し、第２部材（取付金具）とＵ字型ボルトを介して補強桁を枕木に固定したから、枕木と交差する補強桁の周囲を堅固かつ安定して支持でき、しかも、軌框重量の分散を促し、補強桁の強度負担を軽減することができる。
また、本発明によれば、ナットを緩め、第１部材を補強桁の長手方向に向けることで補強桁の取り外しが簡単にでき、軌道保守作業を確実に、しかも効率的に実施することができる。
【図面の簡単な説明】
【図１】本発明の補強桁取付装置の平面図である。
【図２】本発明の補強桁取付装置の正面図である。
【図３】本発明の補強桁取付装置の側面図である。
【図４】本発明で使用する金具（溝型鋼、取付金具）の説明図である。
【図５】本発明で使用するＵ字型ボルトの構成図である。
【図６】本発明で使用する緩み止めナットの説明図である。
【図７】本発明で使用するＵ字型ボルトの変形例を示す図である。
【図８】本発明で使用するＵ字型ボルトの変形例を示す図である。
【図９】本発明においてＵ字型ボルトの変形例を用いたときの枕木抱き込み状態を示す図である。
【図１０】従来技術の補強桁取付装置の平面図である。
【図１１】図１０のＡ−Ａ線矢視図である。
【図１２】図１０のＢ−Ｂ線矢視図及び使用金具説明図である。
【符号の説明】
１１・・道床
１２・・枕木
１３・・レール
１４・・補強桁
１４ｃ・・下側フランジ
１５₁〜１５₃・・溝型鋼
１５ａ〜１５ｃ・・係止部（山形鋼）
１６・・取付金具[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforcing girder mounting device, and in particular, a plurality of reinforcing girders are arranged along a rail fixed to a sleeper, and a pair of U-shaped bolts are attached to the sleeper with a reinforcing girder portion intersecting the sleeper sandwiched in the longitudinal direction. The present invention relates to a reinforcing girder mounting device that is provided so as to embrace and fixes a reinforcing girder to a sleeper through the U-shaped bolt.
[0002]
[Prior art]
Railroad tracks are generally constructed by laying a roadbed made of crushed stone, gravel, etc. on the roadbed, and laying a railroad made of sleepers and rails on the roadbed. The rail pressure is supported by sleepers and transmitted to the roadbed, the sleepers are held in place, and the pressure is transmitted to the roadbed widely and evenly. In such a track, when an underground structure such as an underpass is constructed directly under the roadbed, the roadbed sinks and its supporting force is reduced or lost, which may cause a railroad derailment or rollover accident. For this reason, measures are taken in advance to reinforce the rails and ensure safety. As a method of reinforcing the rail, a method is used in which a plurality of reinforcing girders are installed on the sleepers along the rails, and when this is locked to the sleepers and sinks to the roadbed, the rails are lifted with the reinforcing girders. Yes. At that time, in order to lock the reinforcement girders to the sleepers, holes are made in advance in the lower flanges of the reinforcement girders such as H-shaped steel at the factory, and U-shaped bolts are installed from below so as to embrace the sleepers. The method of inserting and fastening this with a nut is used.
[0003]
However, in this method, if the U-bolts that embed the sleepers are inserted into the holes formed in the reinforcing girders, the installed sleepers are not at regular pitches. In some cases, it cannot be inserted into In such a case, this is dealt with by re-installing a sleeper or by making a hole through the lower flange of the reinforcing beam in the field. The former is very inefficient in construction, and the latter is inconvenient because it complicates the work and causes variations in quality, making it impossible to employ them together.
Based on this result, a reinforcing girder mounting device that can easily and reliably prevent the rail from sinking has been proposed as Japanese Patent Laid-Open No. 9-177003. 10 to 12 are explanatory views of such a proposed reinforcing girder mounting device as the prior art, FIG. 10 is a plan view, FIG. 11 is an enlarged cross-sectional view taken along the line AA in FIG. FIG. 12A is an enlarged cross-sectional view taken along line BB in FIG. 10, and FIG. 12B is an explanatory view of how the reinforcing beam, the support block, and the bridging piece are attached.
[0004]
In this reinforcing girder mounting device, a plurality of reinforcing girders 4 made of H-shaped steel are arranged along rails 3 (FIG. 10) fixed to sleepers 2 embedded at equal intervals in the inside of the road bed 1, and a pair of U-shaped Bolts 10 are provided on both sides in the longitudinal direction of the reinforcing girders 4 intersecting with the sleepers 2 so as to embrace the sleepers 2, and the U-shaped bolts 10 are reinforced by fastening with nuts through the support block 5 and the bridge piece 7. The girders 4 are fixed to the sleepers 2. That is, four substantially L-shaped and box-shaped support blocks 5 (FIG. 12) are provided, and bolt holes 6 a provided in the stepped portions 6 are inserted into the shaft portions 10 a of the U-shaped bolts 10. Two blocks 5 are engaged with the inner surfaces of both sides of the auxiliary beam 4 two by two. In this state, the bridging piece 7 is placed from above the reinforcing beam 4 while the hole 9 formed in the bridging piece 7 is inserted into the shaft portion 10a of the U-shaped bolt 10, and each pair of support blocks 5 is connected to the bridging piece 7. It is fixed with a nut 12 via a U-shaped bolt 10.
[0005]
As described above, according to the conventional reinforcing girder mounting device, the bolts provided on the reinforcing girder by fixing the sleeper 2 and the reinforcing girder 4 with the support block 5, the U-shaped bolt 10, and the bridge piece 7. This type of work efficiency can be improved by eliminating the complicated work of moving the sleepers according to the holes. In addition, the reinforcing girder can be supported stably and firmly and the rigidity of the engaging part of the reinforcing girder can be improved. Furthermore, the use of U-shaped connecting bolts facilitates the attachment between the sleepers and the reinforcing girder. By disposing the support block, it is possible to promote dispersion of the rail weight and reduce the strength burden of the reinforcing beam.
[0006]
[Problems to be solved by the invention]
However, the reinforcement girder mounting device of the prior art can firmly support the rail against the vertical sinking, but the restraining effect by the reinforcement girder and the U-shaped bolt against the horizontal deformation is a deterrent effect. There is a problem that cannot be expected so much.
Further, in the reinforcing girder mounting device of the prior art, since the shaft of the U-shaped bolt is circular in cross section, the contact area between the sleeper and the U-shaped bolt, that is, the area of the part that locks the lower part of the sleeper is narrow, There is a problem of causing fatigue and local damage.
In addition, in the conventional reinforcing girder mounting device, there is a risk that the nut tightening the U-shaped bolt may be loosened due to the influence of train vibration or the like, resulting in an increase in load due to the weight of the rail acting on other parts. is there.
Further, the conventional reinforcing girder mounting apparatus is troublesome in attaching and removing the reinforcing girder, and there is a problem in improving the efficiency of track maintenance work.
[0007]
In view of the above, an object of the present invention is to provide a reinforcing girder mounting apparatus that can enhance the effect of preventing horizontal movement in addition to preventing the rail from sinking, and that can easily attach and remove the reinforcing girder.
Another object of the present invention is to provide a reinforcing girder mounting device that can prevent local damage to sleepers.
Another object of the present invention is to provide a reinforcing girder mounting device that can prevent the bolt from loosening and distribute the rail weight evenly. .
[0008]
[Means for Solving the Problems]
A plurality of reinforcing girders are arranged along rails fixed to the sleepers, and a pair of U-shaped bolts are provided on both sides in the longitudinal direction of the reinforcing girders intersecting the sleepers so as to embrace the sleepers from below. A reinforcing girder mounting device for fixing a reinforcing girder to a sleeper via a bolt, and a first member on which the reinforcing girder is placed and a second member for pressing and fixing the reinforcing girder are provided. Four holes through which the four shaft portions of the pair of U-shaped bolts are inserted are formed in the upper surface flat portion of the first member, and a locking portion is formed so that the upper surface portion of the sleeper is fitted to the lower surface. Further, a tongue piece that holds down the lower flange portion of the reinforcing beam and a hole through which the shaft portion of the U-shaped bolt is inserted are formed in the second member. Insert the first member into the four shafts of the pair of U-shaped bolts and attach the bottom member to the sleeper, and insert the second member into the shaft of the U-shaped bolt. Attach the lower flange of the reinforcing girder with the tongue piece, and then fix the reinforcing girder to the sleeper by fitting a nut into the U-shaped bolt and tightening it. In this way, a locking portion that suppresses horizontal movement of the sleepers is provided on the lower surface of the first member, and the first member is firmly fixed to the reinforcing girder via the second member and the U-shaped bolt. In addition, horizontal movement of sleepers can be effectively prevented.
[0009]
Also, by loosening the nut and orienting the second member in the longitudinal direction of the reinforcing beam, that is, by releasing the pressing by the tongue piece, it is possible to easily remove the reinforcing beam, so that the track maintenance work can be performed reliably. Can be implemented efficiently.
Moreover, local damage to the sleeper can be prevented by flattening the contact portion of the U-shaped bolt with the lower part of the sleeper.
Further, the nut to be fitted into the shaft portion of the U-shaped bolt is a locking nut having a first nut having a convex portion and a second nut having a concave portion engaging with the convex portion. By configuring, it is possible to prevent the bolts from loosening due to train passing vibrations and stably and evenly distribute the rail weight.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 is a plan view of a reinforcing girder mounting apparatus according to the present invention, FIG. 2 is a front view of the reinforcing girder mounting apparatus according to the present invention, FIG. 3 is a side view of the reinforcing girder mounting apparatus according to the present invention, and FIG. (B) is a bottom view of the grooved steel, and FIG. 5 is a configuration diagram of a U-shaped bolt used in the present invention.
In the figure, reference numeral 11 (FIG. 2) denotes a roadbed made of crushed stone, gravel, etc. provided on the roadbed, and sleepers are buried at equal intervals in this interior. 12 is a sleeper having an isosceles trapezoidal cross section, and a concave portion 12a (FIG. 3) having a substantially ship-shaped cross section is formed on the upper surface of the intermediate portion, and a pair of rails 13 are provided apart from each other on the outer upper surface of the concave portion 12a. Reinforcing girders 14 made of H-shaped steel are arranged along the rails 13 on the upper surfaces of both ends of the sleeper 12 and the central recess 12a. The reinforcing girder 14 has an H-shaped cross section, and includes a web 14a, an upper flange 14b and a lower flange 14c projecting from upper and lower ends of the web 14a.
[0011]
On the sleeper portion 12 below the reinforcing beam 14, groove steels 15 ₁ to 15 ₃ are respectively provided, and the reinforcing beam 14 is placed on the groove steel. As shown in FIG. 4, the groove steels 15 ₁ to 15 ₃ are provided with a flat portion PL and wall portions WL1 and WL2 on the upper surface. Further, three engaging portions 15a to 15c are formed on the lower surfaces of the groove steels 15 ₁ and 15 ₃ on both sides so that the upper ends of the sleepers are fitted, and the upper center of the sleepers is formed on the lower surface of the central groove steel 15 _2. Locking portions 15b to 15c are formed so as to fit. Specifically, the locking portions 15a to 15c are formed by attaching L-shaped angle steels to the lower surfaces of the channel steels 15 ₁ to 15 ₃ by welding. Through holes 15d _{1 to} 15d through which the four shaft portions 10a of the pair of U-shaped bolts 10 for fixing the sleepers to the reinforcing girders are inserted into the four corners of the flat portion PL of the groove steels 15 ₁ to 15 _3. ₄ is formed.
In the drawing, through holes 15d _{1 to} 15d ₄ are formed through the locking portions 15b and 15c, but by reducing the width of the locking portions 15b and 15c, holes are not formed in these locking portions. It can also be configured.
[0012]
The U-shaped bolt 10 is juxtaposed on both sides of the reinforcement girder so as to hold the sleeper from below at the intersection of the sleeper 12 and the reinforcement girder 14. Screw portions 10b and 10b are formed at the ends of the shaft portions 10a and 10a of the U-shaped bolt 10 so that nuts can be fitted (FIG. 5A), and the contact portion 10c with the lower part of the sleeper is shown in FIG. As shown to (b), it forms flatly and is devised so that the local damage of a sleeper may not occur.
Through holes 15d _{1 to} 15d ₄ of the grooved steel 15 are inserted into the _four shaft portions 10a of the pair of U-shaped bolts 10 protruding from the bed 11 so as to embrace the sleepers 12, and the four attachments of the reinforcing beam 14 are attached. The metal fitting 16 (FIG. 4) is inserted. The mounting bracket 16 has a tongue piece 16a for pushing the lower flange 14c of the reinforcing beam 14, and a hole 16b through which the shaft portion 10a of the U-shaped bolt is inserted.
[0013]
When assembling the reinforcing girder mounting device, the sleepers 12 are held by a pair of U-shaped bolts 10 at both sides and in the center, and embedded so that the shaft portion 10a protrudes from the road bed 11. In this state, the four through holes 15d _{1 to} 15d 4 of the grooved steel 15 are inserted into the _four shaft portions 10a of the U-shaped bolt 10 projecting from the road bed 11 at the above three locations, and the locking formed on the lower surface The grooved steels 15 ₁ to 15 ₃ are attached to the sleepers so that the portions 15 a to 15 c fit into the upper surface of the sleepers 12.
In this state, the three reinforcing girders 14 are placed in parallel with the rails 13 at the center of the flat portion of the corresponding grooved steel 15 ₁ to 15 ₃ corresponding to each sleeper, and then 4 for each intersection of the sleepers and the reinforcing girders. One mounting bracket 16 is inserted into the shaft portion 10a of the U-shaped bolt so that each tongue piece 16a presses the lower flange 14c of the reinforcing beam 14. Thus, the nut 17 is fitted and tightened to the screw portion formed on the shaft portion 10a of the U-shaped bolt while the lower flange 14c of the reinforcing girder is sandwiched between the flat portion of the groove steel and the tongue piece 16a. As a result, the lower flange 14 c of the reinforcing beam 14 is firmly pressed into the mounting bracket 16 and fixed to the sleeper 12.
[0014]
In this case, the nut can be a locking nut. FIG. 6 is an explanatory view of an example of a locking nut, 21 is a bolt, 22 is a locking nut, and includes a lower nut 22a having a convex portion and a concave portion that engages with the convex portion. An upper nut 22b is provided. By making the outer dimension of the convex part slightly larger than the outer dimension of the concave part, the following effects are exhibited. In other words, after mounting the lower nut 22a, automatically stress is applied to the P ₁ direction of the arrow when tightening the upper nut 22b, the horizontal stress in proportion to the tightening amount increases. This increase in horizontal stress continues until the lower nut and upper nut are brought into close contact with each other, and a complete locking effect due to the wedge action is obtained. That is, the distribution of internal stress after fastening is inherent as a composite stress of P ₁ + P ₂ + P ₃ , is extremely resistant to external impacts and vibrations, and does not loosen. Therefore, by using a locking nut as a nut, it is possible to effectively prevent loosening of the bolt even if vibration caused by passing a train or the like occurs.
[0015]
As shown in FIG. 7, the U-shaped bolt 10 may be processed so as to form recesses 10d and 10d at the base portions of the shaft portions 10a and 10a.
Further, as still another modification of the U-shaped bolt 10, as shown in FIG. 8, a flat plate material is formed at a portion where the shaft portions 10a and 10a are connected after bending a steel material having a circular cross section. 10p may be processed so as to be integrated so that the contact portion 10c with the lower part of the sleeper becomes flat. When the flat material 10p is used, the recesses 10d and 10d are inevitably formed at the base portions of the shaft portions 10a and 10a, as in the case shown in FIG. 7 and 8, when the depressions 10d and 10d are formed in advance, the cross-sectional shape of the sleeper 12 is 90 ° at the bottom as shown in FIG. Occasionally (there are many such sleepers), it becomes possible to fix the reinforcing girders 14 with the U-shaped bolt 10 firmly holding the sleepers 12 from both sides. Therefore, in a U-shaped bolt that has been subjected to a simple bending process, it is difficult to constrain the sleeper 12 in the train traveling direction (the left-right direction in FIG. 9) because R remains at the base portions of the shaft portions 10a and 10a. The U-shaped bolt 10 having the recesses 10d and 10d shown in FIGS. 7 and 8 has an extremely high effect of preventing the reinforcing beam 14 from moving in this direction.
[0016]
As described above, according to the present invention, the grooved steel 15 is installed under the reinforcing girder 14 and the reinforcing girder 14 is fixed to the sleeper 12 via the mounting bracket 16 and the U-shaped bolt 10. The periphery of the reinforcing girder 14 that intersects can be firmly and stably supported, and the weight of the reinforcing girder 14 can be reduced by promoting the dispersion of the rail weight. Further, loosening the nut 17, the mounting bracket 16 90 ⁰ rotation to that point in the longitudinal direction of the reinforcement girder 14, i.e., removal of the reinforcing digit 14 by releasing the holding down, mounted can, remove, the mounting work Easy to do.
Further, locking portions 15 a to 15 c for suppressing horizontal movement of the sleeper 12 are provided on the lower surface of the groove steel 15, and the groove steel 15 is firmly fixed to the reinforcing girder 14 via the mounting bracket 16 and the U-shaped bolt 10. Therefore, the horizontal movement of the sleepers can be effectively prevented in addition to the settlement of the sleepers.
The present invention has been described with reference to the embodiments. However, the present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude these.
[0017]
【The invention's effect】
As described above, according to the present invention, the sinking of the rail can be prevented easily and reliably, and the troublesome work of moving the sleepers according to the bolt holes provided in the reinforcing girder as in the prior art is eliminated, and this type of work efficiency is improved. Can be improved.
Moreover, according to this invention, the latching | locking part which suppresses the horizontal movement of a sleeper is provided in the lower surface of the 1st member (groove-shaped steel), This 2nd member (attachment metal fitting) and U-shape are used for this 1st member as a reinforcement girder. Since it is firmly fixed via the bolt, it is possible to effectively prevent the horizontal movement of the sleeper in addition to the settlement of the sleepers.
[0018]
Moreover, according to this invention, since the contact part with the lower part of the sleeper of a U-shaped volt | bolt was made flat, the local damage of a sleeper can be prevented.
Moreover, according to this invention, the nut fitted in the axial part of a U-shaped volt | bolt is equipped with the 1st nut which has a convex-shaped part, and the 2nd nut provided with the concave-shaped part engaged with this convex-shaped part Therefore, the bolts can be prevented from loosening due to train passing vibrations, and variations in the load acting on the U-shaped bolt due to the loosening can be eliminated.
Further, according to the present invention, the first member (groove steel) is installed under the reinforcing girder, and the reinforcing girder is fixed to the sleeper via the second member (mounting bracket) and the U-shaped bolt. It is possible to firmly and stably support the crossing of the reinforcing girders, and to promote the dispersion of the rail weight and to reduce the strength burden of the reinforcing girders.
Further, according to the present invention, the nut can be loosened and the first member can be directed in the longitudinal direction of the reinforcing beam so that the reinforcing beam can be easily removed, and the track maintenance work can be carried out reliably and efficiently. .
[Brief description of the drawings]
FIG. 1 is a plan view of a reinforcing girder mounting device according to the present invention.
FIG. 2 is a front view of the reinforcing girder mounting device of the present invention.
FIG. 3 is a side view of the reinforcing beam attaching device of the present invention.
FIG. 4 is an explanatory view of a metal fitting (groove steel, mounting metal fitting) used in the present invention.
FIG. 5 is a configuration diagram of a U-shaped bolt used in the present invention.
FIG. 6 is an explanatory view of a locking nut used in the present invention.
FIG. 7 is a view showing a modification of the U-shaped bolt used in the present invention.
FIG. 8 is a view showing a modified example of the U-shaped bolt used in the present invention.
FIG. 9 is a diagram showing a state in which a sleeper is held when a modified example of a U-shaped bolt is used in the present invention.
FIG. 10 is a plan view of a conventional reinforcing girder mounting device.
11 is a view taken along the line AA in FIG.
12 is a view taken in the direction of the arrows BB in FIG.
[Explanation of symbols]
11. Road bed 12 Sleeper 13 Rail 14 Reinforcement girder 14c Lower flange 15 ₁ to 15 ₃ Groove type steel 15a to 15c Locking part (angle steel)
16. ・ Mounting bracket

Claims

枕木に固定したレールに沿って複数の補強桁を配置し、一対のＵ字型ボルトを枕木と交差する補強桁部分の長手方向両側に、下方より枕木を抱き込むように設け、該Ｕ字型ボルトを介して補強桁を枕木に固定する補強桁取付装置において、
上面平坦部に前記一対のＵ字型ボルトの軸部が挿通される穴が形成され、下面に枕木を係止する係止部が形成された第１部材、
前記第１部材の上面平坦部上に載置される補強桁の下側フランジ部を押さえ込むと共に、前記Ｕ字型ボルトの軸部が挿通される穴を有する第２部材、
を備え、
第１部材を前記一対のＵ字型ボルトの軸部に挿入すると共に下面係止部で枕木を係止し、複数の第２部材をＵ字型ボルトの軸部に挿入して補強部材の下側フランジを押さえ込むように配置し、Ｕ字型ボルトにナットを嵌め込んで締め付けることにより補強桁を枕木に固定することを特徴とする補強桁取付装置。A plurality of reinforcing girders are arranged along rails fixed to the sleepers, and a pair of U-shaped bolts are provided on both sides in the longitudinal direction of the reinforcing girders intersecting the sleepers so as to embrace the sleepers from below. In the reinforcement girder mounting device that fixes the reinforcement girder to the sleepers via bolts,
A first member in which a hole through which the shaft portion of the pair of U-shaped bolts is inserted is formed in the upper flat portion, and a locking portion for locking the sleeper is formed on the lower surface;
A second member having a hole through which a shaft portion of the U-shaped bolt is inserted while pressing down a lower flange portion of a reinforcing girder placed on an upper flat portion of the first member;
With
The first member is inserted into the shaft portion of the pair of U-shaped bolts, the sleeper is locked at the lower surface locking portion, and the plurality of second members are inserted into the shaft portion of the U-shaped bolt to A reinforcing girder mounting device, wherein the reinforcing girder is arranged so as to press down a side flange, and a reinforcing girder is fixed to a sleeper by inserting a nut into a U-shaped bolt and tightening the nut.

前記Ｕ字型ボルトの枕木下部との接触部分を平坦にしたことを特徴とする請求項１記載の補強桁取付装置。The reinforcing girder mounting device according to claim 1, wherein a contact portion of the U-shaped bolt with a lower part of a sleeper is flattened.

前記ナットは、凸形状部を有する第１のナットと、該凸形状部に係合する凹形状部を備えた第２のナットを備えた緩み止めナットであることを特徴とする請求項１記載の補強桁取付装置。2. The nut according to claim 1, wherein the nut is a locking nut having a first nut having a convex shape portion and a second nut having a concave shape portion engaged with the convex shape portion. Reinforcing girder mounting device.